function EventTarget(){
	this.handlers = { };
}
EventTarget.prototype = {
	construtor: EventTarget,
	addHandler: function(type,handler){
		if(typeof this.handlers[type] == "undefined"){
			this.handlers[type] = [ ];
		}
		this.handlers[type].push(handler);
	},
	fire: function(event){
		if(!event.target){
			event.target = this;
		}
		if(this.handlers[event.type] instanceof Array){
			var handlers = this.handlers[event.type];
			for(var i=0, len=handlers.length; i<len; i++){
				handlers[i](event);
			}
		}
	},
	removeHandler: function(type,handler){
		if(this.handlers[type] instanceof Array){
			var handlers = this.handlers[type];
			for(var i=0, len=handlers.length; i<len; i++){
				if(handlers[i] === handler){
					break;
				}
			}
			handlers.splice(i,1);
		}
	}
};
